????:1???????????24??:???????

2???????

3???????sn

4?????

5?????????

?11??????????????18??,???G20?????“???”??,??????,???????????????????????,???????????????“???????”??,????????,???????????,?????????,???????

????,????“??”??????“?”???,“?????????,????????????????,????????????????”

????????????????????????,?????,????

???:?

?:??????????? ????????????

? ?:?????? ?????????????

??? ?:??????

??????? ????:???

?????????:???